EC2上的实例存储有什么意义？-WhatisthepointofinstancestorageonEC2?

Instance storage is faster than EBS. You don't mention what you will be doing with your instances, but for some applications speed might be more important than durability. For an application that is primarily doing data mining on a large database, having a few hundred gigs of local, fast storage to host the DB might be beneficial. Worker nodes in a MapReduce cluster might also be great candidates for instance storage, depending on what type of job it was.

实例存储比EBS快。您没有提到您将对实例执行的操作,但对于某些应用程序,速度可能比持久性更重要。对于主要在大型数据库上进行数据挖掘的应用程序,拥有几百个本地快速存储来托管数据库可能是有益的。 MapReduce集群中的工作节点也可能是实例存储的理想选择,具体取决于它的工作类型。

Another point of instance storage is that it's independent. There have been many EBS outages (google e.g. "site:aws.amazon.com ebs outage"). If the instance runs at all, it has the instance storage available. Obviously if you rely on instance storage, you need to run multiple instances (on multiple availability zones) and tolerate single failing instances.

实例存储的另一个要点是它是独立的。有许多EBS中断(谷歌,例如“网站:aws.amazon.com ebs停电”)。如果实例运行,则它具有可用的实例存储。显然,如果您依赖实例存储,则需要运行多个实例(在多个可用区域上)并容忍单个失败的实例。

I know this is late to the game, but one other little considered factoid...

我知道这场比赛已经晚了,但另外一个被认为是偶像的......

EBS storage makes it exceedingly easy to create AMI's from, whereas, instance-store based storage requires that creation of AMI's be done locally on the machine itself with a whole bunch of work to prep, store, and register the AMI.

EBS存储使得创建AMI非常容易,而基于实例存储的存储需要在机器本身上本地完成AMI的创建,其中包括准备,存储和注册AMI的大量工作。